Mechanical Operations Maximum size reduction in a ball mill is done by the, __________ action. Compression Cutting Attrition Impact Compression Cutting Attrition Impact ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity? Raschig rings Cylinder (L/D = 1) Sphere Cube Raschig rings Cylinder (L/D = 1) Sphere Cube ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm)? Spiral separator Trough washer Froth floatation Baum jig washer Spiral separator Trough washer Froth floatation Baum jig washer ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations __________ mills are termed as impactors. Rolling-compression Hammer None of these Cage Rolling-compression Hammer None of these Cage ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to N¹ N° N² N³ N¹ N° N² N³ ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) 1.5 D 2 D D 0.5 D 1.5 D 2 D D 0.5 D ANSWER DOWNLOAD EXAMIANS APP
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